含水率对福建森林草本植物燃烧碳排放的影响

In order to investigate the carbon emission characteristics of herbaceous combustible materials under different water contents,this paper adopts the self-designed biomass combustion and analysis system to simulate the combustion process of widely distributed forest herbs in Fujian Province(Angiopteris fokiensis,Dicranopteris pedata,Miscanthus floridulus,and Microstegium vimineum)under different water contents,and monitor and calculate the carbon gas(CO2,CO,CxHy)and carbonaceous components(TC,OC,EC)in the flue gas in real time.We analyzed the ratio and correlation between OC and EC,compared the carbon conversion efficiency of different carbon substances,and revealed the effect of water content on the carbon emission of surface combustible material of forest.The results showed that(1)herbaceous water content has a significant effect on the emission factors of carbon substances.The emission of CO2 is inhibited with the increase of water content,conversely promoted the emission of CO,CxHy and PM2.5 carbonaceous components;(2)herbaceous water content has a relatively significant effect on the ratio between OC and EC,and the increase of water content will cause the increase of herbaceous KOC/EC,but does not change the strong correlation between OC and EC;(3)Changes in water content affect the mass ratio of carbon substances to carbon elements and the carbon conversion rate.The mass ratio of all carbon substances to carbon elements is similar to the trend of the emission factors of these substances.With the increase of herbaceous water content,ηCO2 decreases,ηCO increases,and ηOther increases slightly and then decreases significantly.